I'm making my first mandolin and I've never had to figure string spacing on a double stringed instrument. The nut width will be 1 1/8". I could use some suggestions for the simplest way figure the gaps between the courses and the strings. Also what do any of you like for spacing between the fretboard edge and the first string. I've seen measurements from 1/16" to 1/8". I'm thinking the less the better to give me more space between courses. What do you all think? Thanks all.